Cisco Small Business RV 120W Wireless-N VPN Firewall ...

Configuring the FirewallConfiguring Attack Prevention4c. Under Rule Status, choose Enabled or Disabled. You may want to configure arule and choose Disabled if you want to enable it at a later time.Configuring Attack PreventionAttacks are malicious security breaches or unintentional network issues thatrender the Cisco RV120W unusable. Attack prevention allows you to manage WANsecurity threats such as continual ping requests and discovery via ARP scans.TCP and UDP flood attack prevention can be enabled to manage extreme usageof WAN resources.As well, certain Denial-of-Service (DoS) attacks can be blocked. These attacks, ifuninhibited, can use up processing power and bandwidth and prevent regularnetwork services from running normally. ICMP packet flooding, SYN trafficflooding, and Echo storm thresholds can be configured to temporarily suspendtraffic from the offending source.To configure attack prevention:STEP 1STEP 2Choose Firewall > Attack Prevention.Check the boxes to enable the following functions:WAN (Internet) Security Checks• Respond to Ping on WAN (Internet)—To configure the Cisco RV120W toallow a response to an Internet Control Message Protocol (ICMP) Echo(ping) request on the WAN interface, check this box. This setting is used asa diagnostic tool for connectivity problems. Not enabled by default.• Stealth Mode—If Stealth Mode is enabled, the router will not respond toport scans from the WAN. This feature makes the network less susceptibleto discovery and attacks. Enabled by default.• Flood— If this option is enabled, the router will drop all invalid TCP packets.This feature protects the network from a SYN flood attack. Enabled bydefault.Cisco RV120W Administration Guide 71